By M. L. Duryea, T. D. Landis (auth.), Mary L. Duryea, Thomas D. Landis, Carol R. Perry (eds.)
ing harm ranged from scent. to normal visible visual appeal. Attributes of seedling caliber are classified as both to slicing buds. to scraping bark to notice lifeless cambium. functionality attributes (RGP. frost hardiness. pressure resistance) One nursery suggested utilizing frost hardiness as a trademark of or fabric attributes (bud dormancy. water kin. meals. whilst to start fall lifting. yet none mentioned utilizing it as an morphology). functionality attributes are assessed via putting indicator of seedling caliber sooner than transport inventory to clients. samples of seedlings into targeted managed environments and comparing their responses. even if a few powerful brief 23.4.3 rigidity resistance lower tactics are being built. functionality assessments have a tendency simply 3 nurseries degree pressure resistance. They use to be time eating; although, they produce effects on complete the companies of Oregon nation college and the try tools plant responses that are usually heavily correlated with box defined in 23.2.3. One nursery mentioned that result of tension functionality. fabric attributes. nevertheless. mirror assessments didn't agree good with result of RGP assessments and that RGP merely person features of seedling make-up and are usually correlated higher with seedling survival within the box. so much rigidity poorly correlated with functionality. checks are carried out for reforestation team of workers instead of for Bud dormancy prestige appears to be like correlated. a minimum of nurseries.
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Extra resources for Forestry Nursery Manual: Production of Bareroot Seedlings
Example text
And H,O, tests are used less frequently. No organization indicated use of seed-vigor expressions. although a few have tried Czabator's (36) germination value. 5 Seed Storage Irregular and often infrequent seed production by many of the major tree species necessitates seed storage-sometimes Table 3. ' Temperature. ' °C Test duration. days Douglas-fir 20-30 21 Ponderosa pine Lodgepole pine Noble fir 20-30 20-30 20-30 21 28 28 White fir 20-30 28 Western hemlock 20 28 Species Additional directions Light': prechill 21 days at 3 to 5°C.
ProcessInc: Currently available seed-cleaning procedures remove all of the empty seed and some of the partially developed seed. A method is needed for separating all the nonviable from viable seed. even including seed that looks fully developed but does not germinate. This is particularly important as precision sowing and uniform spacing of seedlings are introduced to maximize utilization of seedling-production areas. Each seed should have the potential of germinating. emerging through the soil surface.
Probably due to faster drying of cones. Similar observations should be of value in capturing the maximum seed yield of other conifers that have a responsive reflex of cone scales. 3 Artificial ripening It is important that cone collection be initiated after seed has attained full maturity. However. immature seed can be artificially ripened during cone storage in certain species. Artificial ripening has been successful on noble fir [108). grand fir [Abies wandis (Dougl. ex D. ] [102)' white fir [96).